Authenticated RCE through Twig sandbox escape

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-79988
StatePUBLISHED
AssignerHackrate
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-27 17:20:49 UTC
Updated2026-08-27 17:20:49 UTC
DescriptionThe Twig sandbox mechanism in Craft CMS is configured to allow dangerous functionality from the Yii framework, leading to authenticated RCE similar to previously disclosed vulnerabilities.

Risk And Classification

Primary CVSS: v4.0 8.7 HIGH from 7004884b-51e2-48e8-b4a2-5ca29e80453e

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Problem Types: CWE-693 | CWE-693 CWE-693 Protection Mechanism Failure

VersionSourceTypeScoreSeverityVector
4.07004884b-51e2-48e8-b4a2-5ca29e80453eSecondary8.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS8.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Craftcms Cms affected 4.0.0-RC1 4.18.3 semver Not specified
CNA Craftcms Cms affected 5.0.0-RC1 5.10.7 semver Not specified

References

ReferenceSourceLinkTags
github.com/craftcms/cms/releases/tag/5.10.7 7004884b-51e2-48e8-b4a2-5ca29e80453e github.com
www.hckrt.com/hacktivity/HCKRT-8RQQ7K 7004884b-51e2-48e8-b4a2-5ca29e80453e www.hckrt.com
github.com/craftcms/cms 7004884b-51e2-48e8-b4a2-5ca29e80453e github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Oskar Zeino-Mahmalat (@oskar-cure53) (en)

CNA: Hackrate (en)

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